practise favouritism
Cheating for personal gain, a Chinese idiom, Pinyin is y í ngs ī Zu ò B ì, which means to do illegal things by playing tricks for personal gain. It comes from Tang Sitong's daipianshangyu in Qing Dynasty.
The origin of Idioms
Tan Sitong of the Qing Dynasty wrote "the general period of the people's seclusion was as good as possible, and the governor could not cheat for personal gain."
Idiom usage
To act as a predicate, object, or attribute
practise favouritism
sadden one 's friends and gladden one's enemies - qīn tòng chóu kuài
old acquaintances and new customers received alike by the shopmen - shēng zhāng shú wèi
blackmail and impose exactions on - qiāo zhà lè suǒ
obsolete words and expressions must be eliminated - chén yán wù qù